Redmi K90 Ultra vs Vivo X300
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo X300 (2024) runs on the MediaTek Dimensity 9500; launch prices were $420 and $499. By overall MobileRank rating, the Vivo X300 leads — 82/100 vs 73/100 (a 9-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5000); the Vivo X300 is faster in AnTuTu (3,330,801 vs 3,233,695); the Vivo X300 is noticeably lighter (206g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
Vivo X300
What makes Redmi K90 Ultra better?
- Bigger battery: 8550 vs 5000 mAh
- Faster charging: 100W vs 80W
- Higher refresh rate: 165Hz vs 120Hz
- Cheaper at launch: $420 vs $499
- Longer battery life (78/100 vs 69/100)
- Better display (94/100 vs 84/100)
What makes Vivo X300 better?
- Higher AnTuTu: 3330801 vs 3233695
- Better Geekbench Single: 3352 vs 3013
- Better Geekbench Multi: 10402 vs 9287
- Lighter: 206g vs 227g
- Higher performance (94/100 vs 92/100)
- Better camera (78/100 vs 37/100)
- Better portability (55/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Vivo X300, the Vivo X300 scores 9 points higher (82/100 vs 73/100). In the "camera" category, the Vivo X300 leads (78/100 vs 37/100). Value score: Redmi K90 Ultra — 72/100, Vivo X300 — 86/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Vivo X300 and the Redmi K90 Ultra are nearly equal (94/100 vs 92/100). In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 84/100). In the "camera" category, the Vivo X300 significantly outperforms the Redmi K90 Ultra (78/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra is a bit better (78/100 vs 69/100). In the "portability" category, the Vivo X300 notably outperforms the Redmi K90 Ultra (55/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Vivo X300 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Dimensity 9500 | |
| AnTuTu | 3233695 | 3330801 | |
| Geekbench Single | 3013 | 3352 | |
| Geekbench Multi | 9287 | 10402 | |
| Display | 6.8" AMOLED | 6.8" AMOLED | |
| Resolution | 1280x2772 | 2800x1260 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 5000 mAh | |
| Charging | 100W | 80W | |
| Wireless charging | 0W | 40W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 20 MP | 32 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB | |
| Storage | 256GB / 512GB | 256GB / 512GB | |
| OS | Android 16 | Android 14 | |
| Brightness (peak) | 3500 nits | 4500 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP68 | |
| Dimensions | 162.9×77.9×8.2 mm | 150.6×71.9×8.0 mm | |
| Weight | 227 g | 206 g | |
| Launch price | $420 | $499 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo X300
- Main: 50MP f/1.57
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo X300
- 6.8" AMOLED
- Resolution: 2800x1260
- Refresh rate: 120 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo X300
- 5000 mAh
- Wired: 80W
- Wireless: 40W
Overall performance score
We compared Redmi K90 Ultra and Vivo X300, covering their specs and all relevant benchmarks.
Vivo X300 leads Redmi K90 Ultra by 2.9% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $79. Redmi K90 Ultra was $79 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo X300 and the Redmi K90 Ultra are nearly equal (94/100 vs 92/100).
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 84/100).
camera
In the "camera" category, the Vivo X300 significantly outperforms the Redmi K90 Ultra (78/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra is a bit better (78/100 vs 69/100).
portability
In the "portability" category, the Vivo X300 notably outperforms the Redmi K90 Ultra (55/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Vivo X300?
The Vivo X300 edges out the Redmi K90 Ultra by just 9 points — the two devices are very close in overall level.
What is the rating of the Redmi K90 Ultra and the Vivo X300?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Vivo X300 — 82/100.
Which has the better camera: the Redmi K90 Ultra or the Vivo X300?
The Vivo X300 leads on camera score (78/100 vs 37/100).
Should you choose the Redmi K90 Ultra over the Vivo X300?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life. The Vivo X300 is a better fit for gamers and power users, budget-conscious buyers.